Signedunsigned (see gauge for signatures)
Inscribedbooklet titled: The Moe / Diamond Weight / Gauge / Charles Moe / Inventor / P.O. Box 100 / Madison Square Station / New York, N.Y. / Printed In / USA.; paper envelope stamped: Point for Moe's Gauge;
FunctionA device for estimating the carat weight of gemstones without the need to separate them from jewelry pieces.
The gauge calculates carat measurements of gemstones by measuring diameters with the caliper and comparing the results with a printed table.
ProvenanceUsed by Prof. Benjamin M. Shaub, Department of Geology, Smith College, Northampton, MA 01063. Prof. Shaub gifted a total of 11 instruments to the Collection, inventory #s 1997-1-1997 thru 1997-1-2007.